Finding the Fourth Proportional to 12,189.18, 18,280.14 and 5,169.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,189.18 : 18,280.14 = 5,169.09 : x
2. Step 2: Convert to fraction form
   12,189.18/18,280.14 = 5,169.09/x
3. Step 3: Cross multiply
   12,189.18x = 18,280.14 × 5,169.09
4. Step 4: Simplify right side
   12,189.18x = 94,491,656.09
5. Step 5: Solve for x
   x = 94,491,656.09/12,189.18
6. Step 6: Final answer
   x = 7,752.09